Synopsis

A large-scale memory-erasing magic attack hits the magic academy, affecting hundreds of people including professors and mages. While most are confused and forgetful, a mysterious outsider appears, immune to the memory manipulation, and is met with suspicion and questions. Amidst the chaos, some characters notice a strange sound and begin to lose their memories in real time, turning them into mindless husks. A character named Shirone seems to be particularly affected and upset.